Institute Ciencia Y Tecnologa Of Polmeros Csic

San Juan de la Rambla, Spain

Institute Ciencia Y Tecnologa Of Polmeros Csic

San Juan de la Rambla, Spain

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Mora-Barrantes I.,Institute Ciencia Y Tecnologa Of Polmeros Csic | Malmierca M.A.,Institute Ciencia Y Tecnologa Of Polmeros Csic | Ibarra L.,Institute Ciencia Y Tecnologa Of Polmeros Csic | Rodrguez A.,Institute Ciencia Y Tecnologa Of Polmeros Csic | Valentn J.L.,Institute Ciencia Y Tecnologa Of Polmeros Csic
KGK Kautschuk Gummi Kunststoffe | Year: 2012

A new material based on both type of cross-links, ionic and covalent, is proposed in this work combining the excellent properties of ionic elastomers at room temperature while maintaining them stable at high temperatures due to the presence of covalent bonds. The studied polymer matrix was based on carboxylated nitrile rubber (XNBR), which can be cross-linked by dicumyl peroxide (DCP), Calcium Oxide (CaO) or by a mixture of both, obtaining an ionic- covalent combined system. Rheological measurements confirm the improved elastic properties in combination with the thermo-reversibility of the mixed systems. These enhanced properties are due to the presence and thermal behavior of ionic nano-domains, the socalled clusters, surrounded by low mobility regions of rubber chains.

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